"Knowing a scale is not the same as knowing a key. A key has gravity — a mode has a personality. Learn to build from the inside out."
— after George Russell, Lydian Chromatic Concept"The modes are not a collection of exotic scales. They are seven different ways the same twelve tones can declare a different home."
— Traditional music theory aphorism| Symbol | Meaning | Example (C root) |
|---|---|---|
| I, II, III, IV… | Major chord on that scale degree | I = C major |
| i, ii, iii, iv… | Minor chord on that scale degree | ii = D minor |
| vii° | Diminished chord on scale degree 7 | vii° = B diminished |
| III+ | Augmented chord on scale degree 3 | III+ = E augmented |
| ♭VII | Major chord on the flattened 7th degree | ♭VII = B♭ major (in C context) |
| Imaj7, V7, ii-7 | Roman numeral + chord extension | Imaj7 = Cmaj7; V7 = G7 |
| Mode | Interval Pattern | H Steps Fall Between Degrees… | Altered Degrees vs. Major |
|---|---|---|---|
| I — Ionian | W W H W W W H | 3–4 and 7–8 | None (the reference) |
| II — Dorian | W H W W W H W | 2–3 and 6–7 | ♭3, ♭7 |
| III — Phrygian | H W W W H W W | 1–2 and 5–6 | ♭2, ♭3, ♭6, ♭7 |
| IV — Lydian | W W W H W W H | 4–5 and 7–8 | ♯4 |
| V — Mixolydian | W W H W W H W | 3–4 and 6–7 | ♭7 |
| VI — Aeolian | W H W W H W W | 2–3 and 5–6 | ♭3, ♭6, ♭7 |
| VII — Locrian | H W W H W W W | 1–2 and 4–5 | ♭2, ♭3, ♭5, ♭6, ♭7 |
| Root → 3rd (semitones) | Root → 5th (semitones) | Chord Quality | Symbol |
|---|---|---|---|
| 4 (major 3rd) | 7 (perfect 5th) | Major | maj, M, uppercase |
| 3 (minor 3rd) | 7 (perfect 5th) | Minor | min, m, lowercase |
| 3 (minor 3rd) | 6 (diminished 5th) | Diminished | dim, ° |
| 4 (major 3rd) | 8 (augmented 5th) | Augmented | aug, + |
| Root → 7th (semitones) | 7th Type | Added to chord symbol |
|---|---|---|
| 11 | Major 7th | maj7 (e.g. Cmaj7) |
| 10 | Minor 7th (= dominant if triad is major) | 7 or m7 (e.g. G7, Dm7) |
| 9 | Diminished 7th | °7 (e.g. B°7) |
Chord I (root: C)
Stack: C → skip D → E → skip F → G
C→E: 4 semitones (major 3rd). C→G: 7 semitones (perfect 5th).
4 + 7 = major triad. → I — C major
Add 7th: C→B = 11 semitones (major 7th). → Imaj7 — Cmaj7
Chord ii (root: D)
Stack: D → skip E → F → skip G → A
D→F: 3 semitones (minor 3rd). D→A: 7 semitones (perfect 5th).
3 + 7 = minor triad. → ii — D minor
Add 7th: D→C = 10 semitones (minor 7th). → ii-7 — Dm7
Chord iii (root: E)
Stack: E → skip F → G → skip A → B
E→G: 3 semitones (minor 3rd). E→B: 7 semitones (perfect 5th).
→ iii — E minor | Add B→D: 10 st → iii-7 — Em7
Chord IV (root: F)
Stack: F → skip G → A → skip B → C
F→A: 4 semitones (major 3rd). F→C: 7 semitones (perfect 5th).
→ IV — F major | F→E = 11 st → IVmaj7 — Fmaj7
Chord V (root: G)
Stack: G → skip A → B → skip C → D
G→B: 4 semitones (major 3rd). G→D: 7 semitones (perfect 5th).
→ V — G major | G→F = 10 st (minor 7th, dominant) → V7 — G7
Chord vi (root: A)
Stack: A → skip B → C → skip D → E
A→C: 3 semitones (minor 3rd). A→E: 7 semitones (perfect 5th).
→ vi — A minor | A→G = 10 st → vi-7 — Am7
Chord vii° (root: B)
Stack: B → skip C → D → skip E → F
B→D: 3 semitones (minor 3rd). B→F: 6 semitones (diminished 5th).
3 + 6 = diminished triad. → vii° — B diminished
Add 7th: B→A = 10 st (minor 7th) → vii∅7 — Bm7b5 (half-diminished)
Classic Ionian progressions
Chord i (root: D)
Stack: D → F → A. D→F: 3 st (minor 3rd). D→A: 7 st (perfect 5th).
→ i — D minor | D→C: 10 st → i-7 — Dm7
Chord ii (root: E)
Stack: E → G → B. E→G: 3 st (minor 3rd). E→B: 7 st (perfect 5th).
→ ii — E minor | E→D: 10 st → ii-7 — Em7
Chord ♭III (root: F)
Stack: F → A → C. F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
→ ♭III — F major | F→E (outside scale!)... use scale note E: F→E = 11 st → ♭IIImaj7 — Fmaj7
Chord IV (root: G) — THE DORIAN SIGNATURE CHORD
Stack: G → B → D. G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
→ IV — G major. This is the defining Dorian chord. In Aeolian (natural minor), this chord is iv minor — because Aeolian has B♭ instead of B♮. The raised 6th of Dorian makes this chord major, transforming the entire harmonic colour.
G→F: 10 st → IV7 — G dominant 7th
Chord v (root: A)
Stack: A → C → E. A→C: 3 st (minor 3rd). A→E: 7 st (perfect 5th).
→ v — A minor | A→G: 10 st → v-7 — Am7
Note: This v is minor, not dominant — Dorian has no dominant V7 resolving to i. This is why Dorian doesn't function tonally the way Aeolian does in classical harmony.
Chord vi° (root: B)
Stack: B → D → F. B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
→ vi° — B diminished | B→A: 10 st → vi∅7 — Bm7b5
Chord ♭VII (root: C)
Stack: C → E → G. C→E: 4 st (major 3rd). C→G: 7 st (perfect 5th).
→ ♭VII — C major | C→B: 11 st → ♭VIImaj7 — Cmaj7
The Dorian vamp (core identity)
Extended progression
Chord i (root: E)
Stack: E → G → B. E→G: 3 st (minor 3rd). E→B: 7 st (perfect 5th).
→ i — E minor | E→D: 10 st → i-7 — Em7
Chord ♭II (root: F) — THE PHRYGIAN SIGNATURE CHORD
Stack: F → A → C. F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
→ ♭II — F major. This chord — a major chord a half step above the minor tonic — is unique to Phrygian (and Phrygian Dominant). The motion ♭II → i is the Andalusian cadence. It is a modal resolution, not a dominant function resolution.
F→E: 11 st → ♭IImaj7 — Fmaj7
Chord ♭III (root: G)
Stack: G → B → D. G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
→ ♭III — G major | G→F: 10 st → ♭III7 — G dominant 7th
Chord iv (root: A)
Stack: A → C → E. A→C: 3 st (minor 3rd). A→E: 7 st (perfect 5th).
→ iv — A minor | A→G: 10 st → iv-7 — Am7
Chord v° (root: B)
Stack: B → D → F. B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
→ v° — B diminished | B→A: 10 st → v∅7 — Bm7b5
Chord ♭VI (root: C)
Stack: C → E → G. C→E: 4 st (major 3rd). C→G: 7 st (perfect 5th).
→ ♭VI — C major | C→B: 11 st → ♭VImaj7 — Cmaj7
Chord ♭VII (root: D)
Stack: D → F → A. D→F: 3 st (minor 3rd). D→A: 7 st (perfect 5th).
→ ♭VII — D minor | D→C: 10 st → ♭VII-7 — Dm7
Andalusian cadence (defining Phrygian gesture)
Chord I (root: F)
Stack: F → A → C. F→A: 4 st. F→C: 7 st. → I — F major
F→E: 11 st → Imaj7 — Fmaj7
Bonus: The ♯4 (B♮) is the natural #11 extension of this chord. Fmaj7(#11) is the definitive Lydian tonic chord.
Chord II (root: G) — THE LYDIAN SIGNATURE CHORD
Stack: G → B → D. G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
→ II — G major. In Ionian (C major), the chord on degree 2 is minor (ii minor). In Lydian, because B♮ is present (the raised 4th of F), the chord on G uses G–B–D, which is major. This is the most distinctive Lydian chord: a major chord a whole step above the major tonic, both chords major, with no resolution pull between them — pure weightless hovering.
G→F: 10 st → II7 — G dominant 7th
Chord iii (root: A)
Stack: A → C → E. A→C: 3 st. A→E: 7 st. → iii — A minor
A→G: 10 st → iii-7 — Am7
Chord #iv° (root: B) — the altered IV
Stack: B → D → F. B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
→ #iv° — B diminished. Where Ionian has IV major (Fmaj), Lydian has #iv° (Bdim) because the raised 4th (B♮) takes the place of F on degree 4. This removes the resolution to IV altogether.
B→A: 10 st → #iv∅7 — Bm7b5
Chord V (root: C)
Stack: C → E → G. C→E: 4 st. C→G: 7 st. → V — C major
C→B: 11 st → Vmaj7 — Cmaj7
Note: In Lydian, the V chord is Vmaj7, not V7 (dominant). There is no dominant 7th on degree 5 — Lydian does not have a built-in V7→I resolution. This is what gives Lydian its non-functional, floating quality.
Chord vi (root: D)
Stack: D → F → A. D→F: 3 st. D→A: 7 st. → vi — D minor
D→C: 10 st → vi-7 — Dm7
Chord vii (root: E)
Stack: E → G → B. E→G: 3 st. E→B: 7 st. → vii — E minor
E→D: 10 st → vii-7 — Em7
The Lydian float (I–II)
Extended cinematic progression
Chord I (root: G) — THIS TONIC IS ITSELF A DOMINANT 7TH
Stack: G → B → D. G→B: 4 st. G→D: 7 st. → I — G major
Add 7th: G→F: 10 st (minor 7th) → I7 — G dominant 7th (G7)
This is the great paradox of Mixolydian: the tonic chord can carry a dominant 7th without any need to resolve, because in this mode F♮ is a native scale tone. The unresolved dominant 7th is what gives Mixolydian its permanent tension-in-repose.
Chord ii (root: A)
Stack: A → C → E. A→C: 3 st. A→E: 7 st. → ii — A minor
A→G: 10 st → ii-7 — Am7
Chord iii° (root: B)
Stack: B → D → F. B→D: 3 st. B→F: 6 st (diminished 5th).
→ iii° — B diminished | B→A: 10 st → iii∅7 — Bm7b5
Chord IV (root: C)
Stack: C → E → G. C→E: 4 st. C→G: 7 st. → IV — C major
C→B: 11 st → IVmaj7 — Cmaj7
Chord v (root: D)
Stack: D → F → A. D→F: 3 st. D→A: 7 st. → v — D minor
D→C: 10 st → v-7 — Dm7
Note: The v is minor, not dominant. As with Dorian, there is no V7→I resolution in Mixolydian — the mode does not have a built-in leading tone pulling up to the root. Rock composers use this to create an open, unresolved feeling. The I7 does all the harmonic work.
Chord ♭VII (root: F) — THE MIXOLYDIAN SIGNATURE CHORD
Stack: F → A → C. F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
→ ♭VII — F major. This chord is entirely absent from Ionian — F♮ doesn't exist in G major. In Mixolydian, the major chord a whole step below the tonic (♭VII) is one of the most evocative in rock. The I–♭VII–IV–I loop (or I→♭VII→IV→I) is the backbone of countless rock anthems.
F→E: 11 st → ♭VIImaj7 — Fmaj7
Chord vi (root: E)
Stack: E → G → B. E→G: 3 st. E→B: 7 st. → vi — E minor
E→D: 10 st → vi-7 — Em7
The rock Mixolydian loop
Blues-rock extension
Chord i (root: A)
Stack: A → C → E. A→C: 3 st. A→E: 7 st. → i — A minor
A→G: 10 st → i-7 — Am7
Chord ii° (root: B)
Stack: B → D → F. B→D: 3 st. B→F: 6 st (diminished 5th).
→ ii° — B diminished | B→A: 10 st → ii∅7 — Bm7b5
Chord ♭III (root: C)
Stack: C → E → G. C→E: 4 st. C→G: 7 st. → ♭III — C major
C→B: 11 st → ♭IIImaj7 — Cmaj7
Chord iv (root: D) — COMPARE TO DORIAN'S IV
Stack: D → F → A. D→F: 3 st (minor 3rd). D→A: 7 st (perfect 5th).
→ iv — D minor. Because Aeolian has F♮ (the ♭6), stacking thirds from D produces a minor chord. This is the critical contrast with Dorian, which has F♯ (the natural 6) and produces a major IV. The minor iv gives Aeolian a much darker, more conclusive sense of minor tonality.
D→C: 10 st → iv-7 — Dm7
Chord v (root: E)
Stack: E → G → B. E→G: 3 st. E→B: 7 st. → v — E minor
E→D: 10 st → v-7 — Em7
Note: Like Dorian and Mixolydian, pure Aeolian has a minor v, not dominant V. Classical harmony borrows from harmonic minor (raising the 7th to G♯) to create a dominant V7 (E7) in minor keys. In modal Aeolian composition, the minor v is native and the mode avoids classical resolution.
Chord ♭VI (root: F) — THE AEOLIAN SIGNATURE CHORD
Stack: F → A → C. F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
→ ♭VI — F major. The major chord on the flattened 6th degree is one of the most emotionally powerful chords in all of popular music — the "surprise lift" in sad songs. The progression i–♭VI–♭VII–i is the backbone of rock ballads and emotional pop.
F→E: 11 st → ♭VImaj7 — Fmaj7
Chord ♭VII (root: G)
Stack: G → B → D. G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
→ ♭VII — G major | G→F: 10 st → ♭VII7 — G dominant 7th
Classic rock Aeolian (Am–F–C–G)
The minor ballad (i–♭VI–♭VII–i)
Chord i° (root: B) — THE LOCRIAN PARADOX
Stack: B → D → F. B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
→ i° — B diminished. The tonic chord is itself diminished. A diminished chord has no stable resting point — it always pulls somewhere. This means Locrian cannot create the sense of arrival that other modes provide. Composers use this as a feature, not a bug: Locrian creates perpetual unease.
Add 7th: B→A: 10 st (minor 7th) → i∅7 — Bm7b5 (half-diminished)
Chord ♭II (root: C) — THE LOCRIAN ANCHOR
Stack: C → E → G. C→E: 4 st (major 3rd). C→G: 7 st (perfect 5th).
→ ♭II — C major. Because the tonic cannot be stable, composers using Locrian often lean on ♭II as a quasi-tonic. The ♭II major is the most stable chord in Locrian — it anchors without fully resolving.
C→B: 11 st → ♭IImaj7 — Cmaj7
Chord ♭III (root: D)
Stack: D → F → A. D→F: 3 st. D→A: 7 st. → ♭III — D minor
D→C: 10 st → ♭III-7 — Dm7
Chord iv (root: E)
Stack: E → G → B. E→G: 3 st. E→B: 7 st. → iv — E minor
E→D: 10 st → iv-7 — Em7
Chord ♭V (root: F)
Stack: F → A → C. F→A: 4 st. F→C: 7 st. → ♭V — F major
F→E: 11 st → ♭Vmaj7 — Fmaj7
Chord ♭VI (root: G)
Stack: G → B → D. G→B: 4 st. G→D: 7 st. → ♭VI — G major
G→F: 10 st → ♭VI7 — G dominant 7th
Chord ♭VII (root: A)
Stack: A → C → E. A→C: 3 st. A→E: 7 st. → ♭VII — A minor
A→G: 10 st → ♭VII-7 — Am7
Jazz ii∅7 usage (Locrian on the ii chord)
Locrian modal composition (using ♭II as anchor)
| Mode | I / i | II / ii | III / iii | IV / iv | V / v | VI / vi | VII / vii |
|---|---|---|---|---|---|---|---|
| I Ionian | Imaj7 | ii-7 | iii-7 | IVmaj7 | V7 | vi-7 | vii∅7 |
| II Dorian | i-7 | ii-7 | ♭IIImaj7 | IV7★ | v-7 | vi∅7 | ♭VIImaj7 |
| III Phrygian | i-7 | ♭IImaj7★ | ♭III7 | iv-7 | v∅7 | ♭VImaj7 | ♭VII-7 |
| IV Lydian | Imaj7(#11)★ | II7 | iii-7 | #iv∅7 | Vmaj7 | vi-7 | vii-7 |
| V Mixolydian | I7★ | ii-7 | iii∅7 | IVmaj7 | v-7 | vi-7 | ♭VIImaj7 |
| VI Aeolian | i-7 | ii∅7 | ♭IIImaj7 | iv-7★ | v-7 | ♭VImaj7 | ♭VII7 |
| VII Locrian | i∅7★ | ♭IImaj7 | ♭III-7 | iv-7 | ♭Vmaj7 | ♭VI7 | ♭VII-7 |
| Week | Mode | Target Roots | Characteristic Chord to Verify |
|---|---|---|---|
| 1 | Ionian | C, G, F, D, B♭ | V7 — dominant on degree 5 |
| 2 | Dorian | D, A, E, G, B♭ | IV major — major on degree 4 |
| 3 | Mixolydian | G, D, A, E♭, B | I7 — dominant tonic; ♭VII major |
| 4 | Aeolian | A, E, D, C, F♯ | iv minor — minor on degree 4 |
| 5 | Phrygian | E, B, F♯, C♯, A | ♭II major — major one semitone above i |
| 6 | Lydian | F, C, G, D, A | II major — major one whole step above I |
| 7 | Locrian | B, F♯, C♯, E, G | i° diminished — diminished on degree 1 |
| 8 | All modes | B♭, E♭, A♭, D♭, G♭ | All characteristic chords, flat keys |
"Modes are not decorations. They are different ways of inhabiting musical space — each with its own gravity, its own horizon, its own logic of home and away."
— after Miles Davis / George Russell tradition"The composer who can derive every chord from first principles is free. The one who memorises lists is imprisoned by the limits of someone else's memory."
— Workshop aphorism